Legislation in two of the nation's most populous states could force 3D printers to come equipped with technology blocking them from making guns.

A man in his 50s who illegally manufactured, stored, and even test-fired homemade firearms and crossbows has been arrested by police. The Gangwon Provincial Police Agency’s Metropolitan Crime ...

New laws in California and New York might stop anyone from 3D printing guns — and create entirely new kinds of surveillance.

Add Yahoo as a preferred source to see more of our stories on Google. FILE - A handgun frame that has been printed on a 3D printer is held for a photograph at the Bureau of Alcohol, Tobacco, Firearms, ...